 | The examples and perspective in this article may not represent a worldwide view of the subject.(April 2012) |
Crab traps are used to bait, lure, and catch crabs for commercial or recreational use. Crabbing or crab fishing is the recreational hobby and commercial occupation of fishing for crabs. Different types of traps are used depending on the type of crab being fished for, geographic location, and personal preference.
Crab has been a viable food source since Native Americans lived and fished on the Delmarva Peninsula. The Chesapeake Bay, which is known for their Chesapeake Bay blue crabs ( Callinectes sapidus ) derives its name from "Chesepiook", a Susquehannock tribe word that means "Great Water". [1] These Susquehannock natives led European settlers to some of the best places to catch crabs. Even early treaties between European settlers and Native Americans included provisions for the rights of "Hunting, Crabbing, Fowling, and Fishing." [2] Since then, generations of watermen made their living harvesting crabs and other resources along the Chesapeake Bay developing the most efficient method to catch crabs resulting in modern crab traps.[ citation needed ]
Since early European settlers in America, crabbing was an important food source to watermen of the Chesapeake and continues to be the source of income for many families. The Alaskan king crab fishing industry took off in the mid-1800s, and was one of the reasons Alaskans pushed so hard for statehood in 1959. Alaskans wanted to gain control of the area's natural resources, such as king crabs. [3]
Benjamin F. Lewis invented the crab pot in the 1920s, patented it in 1928, and perfected it ten years later. The crab pot changed the way crabs are harvested on the Chesapeake Bay. The crab pot is the most common method used to catch and harvest crabs worldwide. [4]
Commercial crabbing is a very tough and dangerous job, so it is very important that commercial crab traps catch as many crabs as possible to be able to turn a profit. Commercial crabbing is heavily regulated by local state laws to ensure that the crabs are not over fished and that they are given enough time to breed and repopulate. [5]
Unlike normal traps, commercial crab traps are large in size; some can easily be over 60" in diameter, allowing the trap to hold a larger amount of crabs than recreational crab traps. Commercial crab traps also contain a small stainless steel plate like a dog tag, which identifies who the trap belongs to in case it is missed or swept by the current from its original location. [5]
After World War II, Japanese crab vessels were competition for Alaskan king crab fishermen in the Bering Sea. Japanese crab vessels would crowd around cod boats, where king crabs devoured the fish waste. Ed Shields, a king crab fisherman was aboard a schooner at this time and recalls the Japanese encroaching on the Bristol Bay fishing area. Ed Shields says that his father sent a telegram to Seattle, ordering one dozen high-powered rifles for each vessel and one case of ammunition each. [6]
Ed Shields states, "The coast guard didn’t care for this at all, the State Department didn’t care for it, but the news media did. It made good news. There’s no television at this time, but they did get in the national magazines like Time and Life. The adverse publicity to Japanese manufactured goods was so severe at that time from this campaign, the Japanese decided to pull out of Bristol Bay area and he sent a telegram saying, 'Bristol Bay is all clear now, Japanese gone home.'" [6]
The Derelict Crab Trap Removal Program was created by the Louisiana Wildlife and Fisheries Commission in 2004. This was created to remove derelict crab traps from state-owned lakes and river-beds and to reduce the potential impact from these traps. [7] There are also similar programs in other states. They are similar to the program in Louisiana where the traps are removed during a 30-day period. There are programs all over the Gulf Coast, including areas like Texas and Florida. These programs have also been successful with the help of volunteers working together, and over 30,000 derelict traps have been removed in Texas alone. [8]
The Maryland crab pot is an enclosed framework of wire with four openings. These openings are constructed so that when the crabs enter to eat the bait, they cannot escape, and instead become immediately trapped. Once the crab becomes trapped and cannot leave the same way they entered, they float upward and go through the openings of the inner wire portion, which permanently traps the crab. [9]
The Maryland crab pot is a cube, generally two cubic feet and when baited and weighted, might weigh fifteen pounds or more. Sometimes it is left on the bottom for twelve to twenty-four hours or more. The end of the nylon rope is attached to a marked floating buoy so the location can be found and the pot retrieved. [9] The Maryland crab pot is baited from the bottom with several oily fish. This is done by turning the pot on its side, stuffing the bait into the wire container, and closing the opening by securing the flap under the rubber tubing. The pot is then dropped into the water and when the crab fisher returns, pulls the pot up and into their boat. [9]
West Coast crab pots, which are primarily used for catching Dungeness crabs, vary slightly from the Maryland style crab pot. When the crabs enter either of the two funnel-type openings in search of bait, they are unable to exit through these funnel openings and become entrapped in the pot. [9]
Ring crab traps are very popular along the Oregon and Washington Coast. They are primarily used in river mouths and protected bays, but it is possible to use crab rings off the open shoreline. A crab ring is a simple piece of equipment that contains two wire rings that form the top and bottom of a collapsible basket. The lower ring is smaller than the upper ring and connected with a strong netting that forms the sides. Heavy chicken wire, cotton webbing or other suitable materials are used for the bottom. [10]
After the bait is tied securely to the bottom of the basket, the lower basket sinks to the bay bottom where the sides collapse and the top and bottom rings lie together, leaving only a flat platform of tempting bait that the crab can easily reach. After the ring has been left on the bottom, the crabber raises the ring rapidly by pulling up with a rope, which prevents the crabs from escaping while the basket is pulled to the boat. [10] While ring traps may allow crabs to escape more easily, their advantage is that they remain on the bottom for much shorter periods, typically a maximum of 20 minutes or so, versus the 30-45 minutes required for a crab pot to work effectively. [11]
Pyramid crab traps are flat when lying on the bottom of the seafloor, but when raised to the surface, they form the shape of a pyramid. This trap is similar to the ring crab trap because there are no walls or cage that prevents the crabs from escaping before pulling it to the surface. The benefits of the pyramid crab trap over the ring crab trap is that the pyramid crab trap is slightly sturdier and can be used in waters with stronger currents.[ citation needed ]
Box crab traps are made from a strong non-collapsible wire. The main advantages of this crab trap are that once the crab enters searching for the bait it cannot escape, guaranteeing a catch when the crab enters. Along with this comes the added bonus of not having to regularly check the trap. A downside of this trap is storing and transporting it since it does not collapse. [12]
Trot line crab fishing was used exclusively by commercial crabbers from 1870 to 1929, but this method has since been almost entirely replaced by the use of crab pots and crab traps. A trotline is a baited, hook-less, long line that is usually anchored on the bottom and attached to anchored buoys. This trotline is baited and after some time, the fisherman pulls the trotline up with crabs hopefully biting on the bait. [9]
A crab trap which becomes lost or abandoned (usually by accidental detachment of the float) becomes an ongoing environmental hazard. Crabs will continue to enter this ghost trap to eat the bait, become trapped, and starve to death, attracting more crabs and other bottom-dwelling sea life; a single trap may kill dozens of crabs in this manner. For this reason, crab traps in many jurisdictions are required to have a "rot-out panel", a wooden panel the size of the largest entrance into the trap. This panel will disintegrate with a few weeks' exposure to seawater, opening the trap and allowing any crabs inside to escape. Other pots use biodegradable twine, that disintegrates within less than a week. [13]
Whales become entangled in crabbing gear. They get entangled in the vertical lines between crab traps on the ocean floor and the surface buoys. For example, as of 2014 there was an increasing number of entanglements off the coasts of the United States. Management measures have been implemented by NOAA National Marine Fisheries Service. [14]
Environment:
Menhaden, also known as mossbunker and bunker and "the most important fish in the sea", are forage fish of the genera Brevoortia and Ethmidium, two genera of marine fish in the order Clupeiformes. Menhaden is a blend of poghaden and an Algonquian word akin to Narragansett munnawhatteaûg, derived from munnohquohteau, referring to their use of the fish as fertilizer. It is generally thought that Pilgrims were advised by Tisquantum to plant menhaden with their crops.
Angling is a fishing technique that uses a fish hook attached to a fishing line to tether individual fish in the mouth. The fishing line is usually manipulated via a fishing rod, although rodless techniques such as handlining also exist. Modern angling rods are usually fitted with a fishing reel that functions as a cranking device for storing, retrieving and releasing out the line, although Tenkara fishing and traditional cane pole fishing are two rod-angling methods that do not use any reel. The fish hook itself can be additionally weighted with a denser tackle called a sinker, and is typically dressed with an appetizing bait to attract and entice the fish into swallowing the hook, but sometimes an inedible fake/imitation bait with multiple attached hooks is used instead of a single hook with edible bait. Some type of bite indicator, such as a float, a bell or a quiver tip, is often used to relay underwater status of the hook to the surface and alert the angler of a fish's presence.
Trawling is an industrial method of fishing that involves pulling a fishing net, that is heavily weighted to keep it on the seafloor, through the water behind one or more boats. The net used for trawling is called a trawl. This principle requires netting bags which are towed through water to catch different species of fishes or sometimes targeted species. Trawls are often called towed gear or dragged gear.
Bycatch, in the fishing industry, is a fish or other marine species that is caught unintentionally while fishing for specific species or sizes of wildlife. Bycatch is either the wrong species, the wrong sex, or is undersized or juveniles of the target species. The term "bycatch" is also sometimes used for untargeted catch in other forms of animal harvesting or collecting. Non-marine species that are caught but regarded as generally "undesirable" are referred to as rough fish or coarse fish.
Callinectes sapidus, the blue crab, Atlantic blue crab, or, reigonally, the Maryland blue crab, is a species of crab native to the waters of the western Atlantic Ocean and the Gulf of Mexico, and introduced internationally.
The Dungeness crab makes up one of the most important seafood industries along the west coast of North America. Its typical range extends from Alaska's Aleutian Islands to Point Conception, near Santa Barbara, California. Dungeness typically grow 6-7 inches at their widest point and inhabit eelgrass beds and sandy bottoms. Its common name comes from the Dungeness Spit in the Strait of Juan de Fuca, Washington state, United States, which shelters a shallow bay inhabited by the crabs.
Lobsters are widely fished around the world for their meat. They are often hard to catch in large numbers, but their large size can make them a profitable catch. Although the majority of the targeted species are tropical, the majority of the global catch is in temperate waters.
A lobster trap or lobster pot is a portable trap that traps lobsters or crayfish and is used in lobster fishing. In Scotland, the word creel is used to refer to a device used to catch lobsters and other crustaceans. A lobster trap can hold several lobsters. Lobster traps can be constructed of wire and wood, metal and netting, or rigid plastic. An opening permits the lobster to enter a tunnel of netting or other one-way device. Pots are sometimes constructed in two parts, called the "chamber" or "kitchen", where there is bait, and exits into the "parlor", which prevents escape. Lobster pots are usually dropped to the sea floor, one or more at a time, sometimes up to 40 or more, and are marked by a buoy so they can be picked up later.
Seine fishing is a method of fishing that employs a surrounding net, called a seine, that hangs vertically in the water with its bottom edge held down by weights and its top edge buoyed by floats. Seine nets can be deployed from the shore as a beach seine, or from a boat.
Ghost nets are fishing nets that have been abandoned, lost, or otherwise discarded in the ocean, lakes, and rivers. These nets, often nearly invisible in the dim light, can be left tangled on a rocky reef or drifting in the open sea. They can entangle fish, dolphins, sea turtles, sharks, dugongs, crocodiles, seabirds, crabs, and other creatures, including the occasional human diver. Acting as designed, the nets restrict movement, causing starvation, laceration and infection, and suffocation in those that need to return to the surface to breathe. It's estimated that around 48 million tons of lost fishing gear is generated each year, not including those that were abandoned or discarded and these may linger in the oceans for a considerable time before breaking-up.
A trotline is a heavy fishing line with shorter, baited branch lines commonly referred to as snoods suspending down at intervals using clips or swivels, with a hook at the free end of each snood.
Deadliest Catch is an American reality television series that premiered on the Discovery Channel on April 12, 2005. The show follows crab fishermen aboard fishing vessels in the Bering Sea during the Alaskan king crab and snow crab fishing seasons. The base of operations for the fishing fleet is the Aleutian Islands port of Dutch Harbor, Alaska. Produced for the Discovery Channel, the show's title is derived from the inherent high risk of injury or death associated with this line of work.
A fish trap is a trap used for catching fish and other aquatic animals of value. Fish traps include fishing weirs, cage traps, fish wheels and some fishing net rigs such as fyke nets.
Hippoglossus stenolepis, the Pacific halibut, is a species of righteye flounder. This very large species of flatfish is native to the North Pacific and is fished by commercial fisheries, sport fishers, and subsistence fishers.
Alaskan king crab fishing is carried out during the fall in the waters off the coast of Alaska and the Aleutian Islands. The commercial catch is shipped worldwide. Large numbers of king crab are also caught in Russian and international waters.
Striped bass are perciform fish found all along the Atlantic coast, from Florida to Nova Scotia. A distinct strain has historically existed in the Gulf of Mexico, but the fishery that exists there today is for stocked or reservoir-escapee fish. Striped bass are of significant value as sporting fish, and have been introduced to many areas outside their native range.
Fishing techniques are methods for catching fish. The term may also be applied to methods for catching other aquatic animals such as molluscs and edible marine invertebrates.
The following outline is provided as an overview of and topical guide to fishing:
This is a glossary of terms used in fisheries, fisheries management and fisheries science.
The Derelict Crab Trap Removal Program was created by the Louisiana Wildlife and Fisheries Commission in 2004. This was created to remove derelict crab traps from state-owned lakes and river-beds and to reduce the potential impact from these traps. This program also collects data from all of the different animals that were found in the traps. It takes place in different areas of Louisiana usually between late February and early March.
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